DMAIC: Measure
Robert Setaputra
Measure
The measure phase begins with the
identification of the key process metrics.
 Once the key process metrics have been
specified, related process and customer
data is collected.

Purpose of Measure Phase
To validate the data
 To help the team narrowing the range of
potential causes need to be investigated in
Analyze phase.

Framework
Statistical
Problem
Business
Problem
Measurement
Business
Solution
Statistical
Solution
Measurement System Analysis
MSA is a study to determine the extent
and acceptability of system measurement
 5 Properties

 Biasness
 Stability
 Linearity
 Repeatability
 Reproducibility
Gage R&R


Repeatability & Reproducibility (R&R)
Repeatability
 Variation
that is due to the measurement device
(same operator, same part, same device).
 Within person variation.

Reproducibility
 Variation
that is due to the measurement system
(different operators, different parts, same device).
 Between person variation
Gage R&R Study Design
(Crossed Design)
Select a set of representative parts.
 Select a group of operators to measure
the parts.
 Ask the operators to measure for each
part repeatedly.


Ex. 5 parts, 2 operators, and 4 replicates.
Gage R&R using Minitab
Gage R&R Run Chart
 Gage R&R Study (Crossed) – ANOVA
 Gage R&R Contribution


Exercise:
 Table
5.6 (p. 121)
 Table 19.6 (p. 617)